System and method for traffic signal control with integrated priority and routing

Abstract

A system and method training local models associated with a roadside device to form sets of model parameters for controlling a portion of a roadway. Each local model is associated with different model type. Parameters are communicated to intermediate serves, are aggregated by model type and communicated to a global server where common models have parameters aggregated together. At a global server global parameters are generated by aggregation. The first global parameters for a first model type and the second global parameters for a second model type are communicated to update the local models by communicating the global parameters through the intermediate servers. The roadside devices are operated with the first global parameters or the second global parameters.

What is claimed is: 
     
         1 . A method comprising:
 training local models associated with a roadside device to form sets of model parameters for controlling a portion of a roadway, each local model associated with a first model type or a second model type;   communicating the sets of model parameters to either a first intermediate server coupled to a first plurality local models and a second intermediate server coupled to a second plurality of intersections;   aggregating model parameters for each type of local model to form first aggregated parameters for the first model type and second aggregated parameters for the second model type at the first intermediate server;   aggregating model parameters for each type of local model to form third aggregated parameters for the first model type and fourth aggregated parameters for the second model type at the second;   communicating the first aggregated parameters and the second aggregated parameters from the first intermediate server to a central server;   communicating the third aggregated parameters and the fourth aggregated parameters from the second intermediate server to the central server;   aggregating the first aggregated parameters and the third aggregated parameters to form first global parameters;   aggregating the second aggregated parameters and the fourth aggregated parameters to form second global parameters;   communicating the first global parameters and the second global parameters to the local models; and   operating the roadside devices with the first global parameters or the second global parameters.   
     
     
         2 . The method of  claim 1  wherein controlling a portion of roadway comprises controlling an intersection or corridor. 
     
     
         3 . The method of  claim 1  wherein controlling a portion of roadway comprises controlling a corridor comprising a plurality of roadside devices. 
     
     
         4 . The method of  claim 1  wherein communicating the sets of model parameters to either the first intermediate server or the second intermediate server comprises communicating the sets of model parameters to either the first intermediate server coupled to a first plurality of roadside devices, or the second intermediate server coupled to a second plurality of roadside devices. 
     
     
         5 . The method of  claim 1  further comprising establishing model types with roadside devices having similar intersection characteristics include behavior or physical layout. 
     
     
         6 . The method of  claim 1  wherein communicating the first global parameters and the second global parameters to the local models comprises communicating the first global parameters to models comprising the first model type and communicating the second global parameters to models comprising the second model type. 
     
     
         7 . The method of  claim 1  wherein communicating the first global parameters and the second global parameters to the local models comprises communicating the first global parameters and the second global parameters to models through first and second intermediate server. 
     
     
         8 . The method of  claim 1  further comprising generating a routing request from a vehicle and determining a route at the central server using the first global parameter and the second global parameters into real-time routing decisions. 
     
     
         9 . The method of  claim 1  wherein aggregating model parameters comprises aggregating model parameters and rewards based on feedback of traffic condition data. 
     
     
         10 . The method of  claim 1  wherein aggregating model parameters comprises aggregating gradients based on traffic conditions. 
     
     
         11 . The method of  claim 1  further comprising dynamically adjusting the model parameters based on real-time traffic data received from vehicle sensors and roadside devices. 
     
     
         12 . The method of  claim 1  generating a final model after a plurality of training rounds and continuously updating the local models using the final model, ensuring real-time adaptation to traffic flow. 
     
     
         13 . A system comprising:
 a plurality of local models associated with a roadside device having sets of model parameters for controlling a portion of a roadway, each local model associated with a first model type or a second model type;   a first plurality local models and a second plurality of local models receiving the sets of model parameters;   a first intermediate server is programmed to aggregate model parameters for each type of local model to form first aggregated parameters for the first model type and second aggregated parameters for the second model type at the first intermediate server and communicate the first aggregated parameters and the second aggregated parameters to a central server;   a second intermediate server is programmed to aggregate model parameters for each type of local model to form third aggregated parameters for the first model type and fourth aggregated parameters for the second model type and communicate the third aggregated parameters and fourth aggregated parameters to a central server;   the central server programmed to aggregate the first aggregated parameters and the third aggregated parameters to form first global parameters, aggregate the second aggregated parameters and the fourth aggregated parameters to form second global parameters and communicate the first global parameters and the second global parameters to the local models; and   the roadside devices programmed to operate with the first global parameters or the second global parameters.   
     
     
         14 . The system of  claim 13  wherein the portion of the roadway comprises a corridor comprising a plurality of roadside devices. 
     
     
         15 . The system of  claim 13  wherein first intermediate server is coupled to a first plurality of roadside devices and the second intermediate server is coupled to a second plurality of roadside devices. 
     
     
         16 . The system of  claim 13  wherein the model types having similar intersection characteristics include behavior or physical layout. 
     
     
         17 . The system of  claim 13  wherein the central server communicates the first global parameters to models comprising the first model type and communicates the second global parameters to models comprising the second model type, ensuring real-time adaptation to traffic flow. 
     
     
         18 . The system of  claim 13  wherein the central server communicates the first global parameters to models comprising the first model type and communicates the second global parameters to models comprising the second model type through first and second intermediate server. 
     
     
         19 . The system of  claim 13  wherein the model parameters comprise rewards based on real-time feedback. 
     
     
         20 . The system of  claim 13  wherein the central server is programmed to prioritize global parameters based on current road conditions, with higher priority given to congested intersections.